kernull

This is a personal playground for tinkering with OS kernel development. It's not meant for production or serious use; it's a space for experimenting, learning, and having fun with low-level code.

Nonetheless...

Building

For building kernull you'll need:

• nasm assembler.
• clang compiler.
• lld linker.
• make tool.
• grub-mkrescue from the grub package.
• An emulator, such as qemu.

Typically to check it out you want to type

make run

(there's nothing interesting you can do at the moment). All make options are:

• make - build kernel binary.
• make iso - above + generate kernel image.
• make run - above + launch it in QEMU.
• make clean - remove binary and image.
• make clean_all - remove generated objects, binary and image.

Roadmap

To achieve usability and, as a victory gesture, compile kernull under kernull, the following must be done:

• Boot
• Enter 64-bit mode
• Setup interrupts
• Setup paging
• Frame allocator
• Kernel heap allocator
• PS/2 support
• Multitasking support
• VFS
• Userspace
• Keyboard support
• Program loading
• Syscalls
• Fork and execute
• Shell

After that I can have some fun and do:

• Symmetric multiprocessing
• ext2 support
• Bitmap graphics instead of VGA text mode
• TCP/IP stack
• USB support

...and so on.